iC212
HIGHSPEED PHOTORECEIVER
nar y
limi
pre
Rev A2, Page 8/15
6. With a sensor area of 100 mm² this results in
E(Newport) = 0.0644 mW/mm²
The results match within 10%.
Measurment of Irradiance E
1. Put laser in CW mode
2. Homogenisation of laser light with microlens ar-
rays (Fig. 10)
3. Put iC212 into the center of the homogenised
laser light (Fig. 11)
4. Read oscilloscope: U = 76 mV (Fig. 12)
Calculation:
λ
= 659 nm, spectral response taken
from Figure 4: S(@659 nm) = 1.42 V/mW, effec-
tive area (Item No. 302: Aeff = 0.75 mm²)
E(iC212)
=
=
U
S
∗
A
eff
0.076
V
mW
= 0.071
V
mm
2
1.42
mW
∗
0.75
mm
2
Figure 11: iC212 in the center of the homogenised
laser light
Figure 9: Laser 659 nm, 150 mW with two mi-
crolens arrays for homogenisation
Figure 12: Oscilloscope reading
Figure 10: Homogeneously illuminated area of ca.
4 cm x 4 cm
5. Put Newport sensor into laser beam and read the
power: P
opt
(Newport) = 6.441 mW (Fig. 13)
Figure 13: Newport sensor in the center of the ho-
mogenised laser light
ICHAUS [ IC-HAUS GMBH ]
